While not fully committing to the idea that WildStar players will be able to use a controller to play the game, Carbine did reveal to Strategy Informer that it is a "passion project" at the company and is indeed in development.
Carbine has revealed that controller support for Wildstar is in development, but it remains a “passion project” within the studio, and not something the company wants to officially commit to.
Speaking to Strategy Informer, Creative Director Matt Mocarski mentioned, “Very early one in development, we actually hooked up an Xbox Controller to our PC’s and started playing with that. It actually felt really cool.”
Read more at the link above. Our thanks to Strategy Informer for the tip!